What you are talking about is to make the products in the package sterile, which is a non-woven fabric with antibacterial finishing.
Commonly used antibacterial drugs and antibacterial mechanism;
1. Metal salt antibacterial agent. There are mainly silver nitrate, mercury chloride and tin oxide. Its antibacterial mechanism is that under the action of metal ions such as silver ions, the protein structure in microbial cells is destroyed, resulting in metabolic disorders.
2. Organic quaternary ammonium salt antibacterial agent. It is mainly the electrostatic adsorption of quaternary ammonium cations and anions on the surface of microbial cells, coupled with hydrophobic effect, which destroys the surface structure of microbial cells.
3. Copper compound antibacterial agent. It is mainly polyacrylonitrile copper sulfide complex that destroys the combination of microbial cell membrane and hydrophobic groups of intracellular enzymes.
4. Organic nitrogen antibacterial agent. In the comparative test, it is considered that its antibacterial ability is stronger than that of quaternary ammonium salt antibacterial agent.
5. Natural antibacterial materials. For example, chitosan in chitin, the positively charged amino group in its molecule absorbs bacteria and combines with the anion of bacterial cell wall, which can hinder the growth and synthesis of bacteria.
(The above information comes from nonwovens, Donghua University Press)
As for the number of years you mentioned, please forgive me. Personally, I think it is necessary to send the packaged products to the corresponding testing units for inspection, so as to measure more accurate results inside.